J. Anim Sci.
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J. Anim Sci. 1979. 48:742-747.
© 1979 American Society of Animal Science
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Ammonia-Mineral-Suspension Treated Corn Silage, Protein Levels and Monensin for Growing and Finishing Beef Cattle1,2,

T. W. Perry, W. J. Dunn3, R. C. Peterson4, W. M. Beeson, M. Stob and M. T. Mohler

Purdue University, West Lafayette, IN 47907

Abstract

Three experiments were conducted with finishing beef cattle to study monensin, ammonia-mineral-suspension (AMS) corn silage and protein level effects. In the two monensin experiments, there was a feed efficiency improvement due to monensin (Experiment II, 11.2%; Experiment III, 13.2%). Cattle fed AMS corn silage gained faster (P<.01) than cattle fed regular silage as the result of more rapid early adjustment in one experiment.

Comparative protein levels of from 515 to 722 g per day for growing heifers resulted in nonsignificantly different gains of .76 to .83 kg per day.

At the lowest protein level (478 g total protein per day), the feeding of 150 mg monensin per heifer daily resulted in increased (P<.01) blood plasma urea nitrogen and also rumen fluid ammonia, suggesting a role for monensin of protein sparing on protein borderline to deficient diets. Increased levels of supplemental protein resulted in increased (P<.01) blood plasma urea N, but there was no monensin effect on such levels at optimum or high protein (555 or 650 g per day).

Footnotes

1 Department of Animal Sciences, Journal Paper No. 6935, Purdue University Agricultural Experiment Station.

2 Supported by grants-in-aid from Eli Lilly and Co., Indianapolis, IN and Ruminant Nitrogen Products, Okemos, MI.

3 Eli Lilly and Co., Indianapolis, IN.

4 Superintendent, Lynnwood-Purdue Agricultural Center, Carmel, IN.






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Copyright © 1979 by the American Society of Animal Science.